== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:54:49 (1784084089)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.28429 s, 16.7 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9b3004c1c000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.25162
Iter 1/10: OSS cache speed: 2.27905
Iter 1/10: ladvise speed: 2.36676
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.03993
Iter 2/10: OSS cache speed: 1.1607
Iter 2/10: ladvise speed: 0.99266
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.595319
Iter 3/10: OSS cache speed: 0.742567
Iter 3/10: ladvise speed: 0.765127
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.711251
Iter 4/10: OSS cache speed: 0.990965
Iter 4/10: ladvise speed: 1.56971
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.19772
Iter 5/10: OSS cache speed: 1.68137
Iter 5/10: ladvise speed: 1.91973
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.95056
Iter 6/10: OSS cache speed: 2.29037
Iter 6/10: ladvise speed: 2.00033
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.61455
Iter 7/10: OSS cache speed: 2.01478
Iter 7/10: ladvise speed: 1.97472
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.13744
Iter 8/10: OSS cache speed: 2.31465
Iter 8/10: ladvise speed: 2.34099
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.19981
Iter 9/10: OSS cache speed: 2.52524
Iter 9/10: ladvise speed: 2.35771
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.36872
Iter 10/10: OSS cache speed: 2.42251
Iter 10/10: ladvise speed: 2.36526
Average uncached read: 1.60
Average speedup with OSS cached read:  1.84 = +15%
Average speedup with ladvise willread:  1.86 = +16%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0